Step ladder



FIG. 1 is a front perspective view of a step ladder.

FIG. 2 is a front elevation view thereof.

FIG. 3 is a rear elevation view thereof.

FIG. 4 is a right side elevation view thereof.

FIG. 5 is a left side elevation view thereof.

FIG. 6 is a top plan view thereof.

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is a rear perspective view thereof.

The dashed broken lines in the drawings depict portions of the stepladder that form no part of the claimed design.

CLAIM We claim the ornamental design for step ladder, as shown anddescribed.